#include<stdio.h>
void As(int*pa,int*pb)
{
		int c=0;
		c=*pa;
		*pa=*pb;
		*pb=c; 	 
}
int main()
{
	int a=10;
	int b=20;
	printf("a=%d b=%d",a,b);
	As(&a,&b);
	printf("\na=%d b=%d",a,b);
}
	
	
	

